Decim is straightforward and may seem cold, but he yearns to empathize with humans and find happiness. As an INFJ, Decim is complex, private, and has an unrivaled thirst for knowledge.

Being an ENFJ, Chiyuki is highly attuned to the emotions of others and thus provides good leadership. She is also warm and responsible, clashing nicely with Decim's quiet exterior.

Ginti can be thought of as a risk-taker and enjoys competition. An ESTP is brave enough to stand up for their beliefs, as Ginti has done multiple times in the anime.

Clavis is hardworking and loyal to a fault. He always gets his job done (as an ISTJ should) and carries out his duties with vigor.

As an ESFP, Oculus hates being alone and is quick to befriend others due to his outgoing and relaxed personality. He always wants to have a friend with him (often by asking Nona to visit him).

Quin is often shown to be ingeniously alert and outspoken among her arbiter peers. She is seen to be bored by routine and strives to do things in a different way every time.

Castra is conscientious and cooperative. Although she likes to work alone, she is seen to be perceptive on the needs of others and makes it her duty to fulfill them.

As an ESTJ, Nona can be forceful in implementing her plans onto others and has a knack for organizing people to fulfill duties. She is realistic, stern, and decisive.